Siemens SINAMICS G120C Function Manual

6.5.3 Switching off the motor when SS1 is active
Description
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Figure 6-20 OFF2 command when the SS1 safety function is active (example: SS1 with braking ramp
monitoring)
If you switch the motor off with the OFF1 or OFF3 command while the SS1 safety function is
active, for example when limit switches are reached, this does not affect how the motor
behaves. SS1 remains active and the inverter brakes the motor until the standstill detection
threshold is reached.
If you switch off the motor with the safety SS1 function active using the OFF2 command, then
the behavior of the drive is dependent on the setting of the SS1 safety function:
● SS1 without speed monitoring:
The inverter switches off the motor torque. The motor then coasts to a standstill. After the
delay time, STO is active.
● SS1 with speed monitoring:
The inverter switches off the motor torque with the STO safety function. The motor then
coasts to a standstill.
Inverter signal Parameters Included in the PROFI‐
safe telegram
Can be interconnec‐
ted with
F-DI F-DO
STO active (extended functions) r9722.0 ✓ --- ✓
Deselect SS1 (basic functions) r9773.5 ✓ ✓ ---
SS1 active (extended functions) r9722.1 ✓ --- ✓
Deselect SS1 (extended functions) r9720.1 ✓ ✓ ---
SAM/SBR active r9723.16 --- --- ---
Operation
6.5 Safe Stop 1 (SS1)
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
244 Function Manual, 01/2017, FW V4.7 SP6, A5E34261271B AD

Siemens SINAMICS G120C Specifications

General

Brand	Siemens
Model	SINAMICS G120C
Category	Inverter
Language	English